Chill-mold.



No. 882,507. PATENTED MAR. 17, 1908.

E. A. TVERDAHL,

CHILL MOLD.

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No. 882,507. PATBNTBD MAR. 17, 1908.

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CHILL MOLD.

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UNITED STATES PATENT OFFICE.

EDWARD A. TVERDAHL, OF COSHOCTON, OHIO, ASSIGNOR OFONE-HALF TO CHARLESW.

BURROWS, OF COSHOCTON, OHIO.

CHILL-MOLD.

To all whom ttmay concern:

Be it known that I, EDWARD A. TVER- DAHL, a citizen of the UnitedStates, residing at Coshocton, in the county of Coshocton and State ofOhio, havev invented certain new and useful Improvements in Chill-Molds, of which the following is a specification.

This invention relates to chill molds, and particularly to a chill formolding sash weights, although, the invention may be applied to otherarticles if so desired.

The sash weights or other articles are cast in steel tubes of propersize, cooled or chilled by water, and improved means are provided forconnecting or molding in an eye at the end of the sash weight, when theweight is cast.

The invention is illustrated in the accompanying drawings, in whichFigure 1 is a front elevation of the chill. Fig. 2 is a side elevationthereof. Fig. 3 is a top view, with the sprue plate removed. Fig. 4 is aplan of the sprue plate. Fig. 5 is a bottom view of the chill. Fig. 6 isa vertical section of the chill on the line 6 6 of Fig. 2. Fig. 7 is aview ofthe sash weight produced.

Referring specifically to the drawings, the rectangular cast iron framea, together with the side plates l) attached by screws thereto, and thetop plate e, form the water jacket. Trunnions c`are cast on the frame a,and may be sup orted by any ordinary floor stand or sha t hanger so thatthe chill can be revolved or turned upside down if desired. The inlet dand outlet fl permit the circulation of water through the chill, whichis Water-tight. p

Within the chill box or casing as above described, are tubes h, made ofseamless steel and reamed with a slight taper. They are threaded on theoutside at the upper end and screwed into holes in the top plate e, andare threaded on the inside at the lower end to receive screw plugs lc.The length and diameter of the tubes h are governed by the size of thesash weight required.

The steel plugs 7c are bored through their entire length to permit theplacing of round Wrought iron pins 1 which afterwards are bent to formthe eyes of the sash weights. The plugs are counter-sunk at the upperend to give the sash weights a conical head, and on the lower end theplugs are turned down Specification of Letters Patent.

Application filed April 30, 1907.

Patented March 17, 1908.

Serial No. 371,123.

and passed through properly drilled holes in the frame a and arethreaded to receive cast iron washers t, which, as well as the frame a,are counter-sunk to receive packing at r. The lower ends of the shanksare threaded to receive the nuts o, and coiled springs m are placedbetween the nuts and the washers. The object of these springs is to takeup expansion and contraction due to the variable temperature, and thenuts o furnish a means of regulating the pressure on the packing betweenthe washers and the frame.

Rods or pin supports Z extend through the bore of the plugs k, and arelooped at the lower end, and the-upper ends of the loops are caughtagainst the threads of the plungers 7c, just below the nuts 0, wherebythe rods support themselves, and also support the eye pins q referredto.

The cast iron sprue plate f forms a grate for each tube 7L. This plateis machined or counter-sunk on the under side, at the (fates, so as togive the sash weights a rounded` end, and the sprue plate is alsocounter-sunk on the upper side so that when the tubes and sprue arepoured full of metal it will give the sash weights heads by means ofwhich they can be drawn from the tubes with the sprue plate, from whichthey are afterwards detached. Tongs t' are arranged to engage holes inthe end of the sprue plate to lift the same. The plate is guided to itsproper position on the top plate e by means of the dowel pins g.

In order to strengthen and stiflen the tubes 7L, cast iron rings orflanges s are placed thereon at intervals of a few inches, and steelrods t are run through the flanges and fixed thereon. This forms a trusswhich strengthens and stiflens the tubes.

The obj eet of the revolving chill, or of constructing it so that it canbe revolved or turned upside down, is that in the event that a tube isonly partially 'l'illcd and the weight cannot be drawn by the sprueplate, the chill may be inverted and the weight pushed out.

In the use of the mold, the eye pins g are set in place and the metal isthen poured, suflieient to iill the tubes and the gates. The water isthen admitted to the jacket to chill the mold, after which the sashweights can be drawn by lifting the sprue plate. After the weights aredrawn and detached the rods g are bent to form the eyes.

I claim:

1. rfhe combination With a chill easing, and a tube therein, of a plugextending through the casing and into the end of the tube, said plughaving a bore adapted to hold an insert for the casting, and a rodextending into the bore from the exterior of the casing, to support theinsert.

2. The combination with a chill casing, and a tube therein, of a plugextending through the Wall of the casing and into the end of the tube, apacking Washer and a nut on the plug, and a spring between the nut andWasher.

3. A mold comprising a jacket having trunnions whereby 1t may beinverted, and a tube therein opening at one end through one side of thejacket, and a plug fitting in the other end of the tube and extendingthrough the opposite side of the jacket, said plug having a longitudinalbore and a removable rod therein.

4. A mold comprising a Water jacket, and a tube therein havingstrengthening plates around the same and rods extending through saidplates.

ln testimony Whereot1 I affix my signature, in presence of twoWitnesses.

EDV/'ARD A. TVERDAHL. Witnesses: i

J. ToRRENs STEWART, LEVI VILLIAMS.

